Barrel-stave machine



(No Model.) 3 sheets-sheen 2.

W. H. GRIFFITHS.

BARREL STAVB MACHINE.

Patented Mar,.6,1883.

'Mmmm wanhingwn. D. c

(N o Model.) 3 Sheets-Sheet 3.

W. H. GRIFFITHS. BARREL STAVE MAGHINE.

Nmzmzm; Patentd Mar. 6,1883.

www?? .M75/miriam Ilm/Wahn 'UNITED STATES PATENT @Trier-.

W-IL'LIAM H.- GRIFFITHS, OF SOMERVILLE, MASSACHUSETTS.

`BARREL-STAVE MACHINE.

SPECIFICATION forming part of Letters PatentNo. 273,274, dated March 6, 1883. l Application nieu Marchas, lasse. (No model.)

To all whom it may concern Be it known that I, WILLIAM HALL GRIF- FITHS, of Somerville, in the county of Middlesex and State ot' Massachusetts, have invented new and useful Improvements in Barrel-stave Machines, of which the following is a specili- `cation.

My invention has for its object the automatic shaping of vbarrcl-staves by devices which work successively to bevel and shape the edges, then to convex the stave, and finally concave it. I attain this' object by the mechanism illustrated in the accompanying drawings.

Figure 1 is a side elevation ot my machine. Fig. 2 is a plan of the same. Fig. 3 is a' longitudinal vertical section ot' the same. Fig. 4 is an end elevation of the same, part in section. Figs. 5 and 6 are views partly in elevation and partly in section. Fig. 7 illustrates methods ot' tonguing and grooving the edges ofthe staves. Fig. 8 shows a pair .of withdrawing rolls. Fig. 9 is an enlarged view, showing in vertical elevation the device for regulating the spread and angle of the edgejointing cutters. Fig. 1() is a horizontal section taken ou a line y y, Fig. 9. Fig. 11 is a vertical section taken through the line x a: of Fig. 9. Fig. 12 is a detail showingone of the housings for holding the shaft of the edgejointer cutter, and, in connection with thesaine, its sliding box.

In the drawings, A A' A2 represent the frame of.' the machine, to which the other partsare attached, and C in Figs.1 and 2 represents the bed-'plate of the machine, upon which the stock to be worked is placed, as shown at I), Figs. 1, 2, and 3.

B, Figs. 1,2, and 3, is a sprocket-chain, provided with hooks b b' atintervals. This sprockct-chaiu passes around a sprocket-roller, 1)', Figs. 3 and 6, this roller D' also answering for a supporting-roll for the stock P. (See Fig. 6.)

The grooved or sprocketed pulleys D2 D3, Fig. 3, serve simply as guides and adjusters for the chain B.

Thesprocket-roller D' hasa shaft, D6, Figs. 1, 2, and 6, which is connected tothe powergenerator, which drives it, and through it and the gear-wheel F', Figs. 1 and 2, allot' the.

vother gear-wheels shown in Fig. 1 and their 4 connected parts. Y

The device for trimming and beveling the edges of the staves is show n in Figs. 4 and 9 in'elevation, and in section in Figs. 10 and 11.

R-and R', Figs. 4, 9, 10, and 11, represent swinging housings, which swing on a common adjustable center pivot, R2, Figs. 9, 10, 11, and '12. These housings R R' are made in thevform shown in Fig. 12. -In these swinging housings R R', I hang the shafts H3 H5, and upon the upper ends of these shafts H3 and H5, I affix the cutter-heads, which serve as trimming and jointing or tonguing and grooving tools, H and H', and to their lower ends the belt-pulleys H4 and H6. (See Figs. 4, 9, and 1l.) The center pivot, R2, is located at a point which is at a distance from the stave l) equal to the, semidiameter of the barrel for which the stave is intended, and is made adjustable vertically by the following device: It (the pivotR2) is attached to a slide, R3, Figs. 10 and 11, which moves vertically in ways R4, Figs. 10 and 11. The slide R3 and the pivot R2 are moved vertically by means of the bentlever R5, Figs. 9 and 10, this bent lever being pivoted upon r, Figs. 9 and 10, as a fulcrum, the upper end of' the bell-crank lever R5 being connected to the link FB, Figs. 4 and 9, by they link RG, so that any longitudinal movement of the link FB will cause a corresponding vertical movement ofthe pivot R2. The housings R' R? are moved about their adjustable common center at the pivot R2 by the action of the cam groove F on the cylinder F5, which acts through the link F8 on a lever, S, Figs. 9 and 11. This lever S swings on a pivot, a, Figs. 9 and l11, and is connected by the links a' (d to the housings R RZ, the action of this part ot' the device being to swing the cutters H H' in and out to give the stave the desired widening at the middle and narrowing at the ends.

The device which I have described for moving the pivot R2 up and down, about which the housings R R' swing, operates in connection vwith the link F8, Fig. 9, and serves to vary the angle at which the cutter-heads H H' work as they successively operate on the different portions of the length ofthe stave, so that'although these staves are jointed beforethey are curved the angle of thejoints will be right after the sta-ve is bent to form the bulge of the barrel, since the distance between the pivot R2 and the stave P is always the same as the semie :nach

diameter of the barrel at the place correspondl The adjusting-boites shown at V V', Fig. 1,

in gto the part upon which thecutter-heads are operating.

The housings R and R' are held vertically in position by links R8, Figs. 10 and 11, said links being pivoted at their lower end to the frame of the machine, and at their upper ends to the upper part of the housings R R', as shown at R9, Fig. 11.

Having described the more complicated parts of the machine, I will proceed to describe the other portions in connection with the working of the machine.

The stock (which is first sawed out) is placed on the table C, between the guides C' C2, Fig. 2, and is caught by the hook b ou the chain B, Figs. 2 and 3, on the table C,- Which carries it along to the roll E, said roll E holding it down while the cutters H H' are finishing the edges, the cutters yH H' being opened and closed by the cam FG and link FB, which action gives a taper to the stave, said cam making one revolution during the passage of a stave, the cutters being open the widest when operating on the center of the stave.

By adjusting the connecting-link F8, which transmits motion from the cam FG to the lever S, so as to connect with the lever S at a point higher or lower, I can get more or less taper to the stave, as desired. By changing the knives on the cutter-heads H H', I can tongue and groove the staves in any form, some ot' which are shown in Fig. 7. The chain B carries the stave entirely past the said cutters H H', Fig. 2between the first pair of feedrolls, D5 D', Fig. 3. The bottom one, D', contains the sprocket-wheel, which carries the chain B. After passing the rst pair of feedrolls the stave runs over another roll, K', and under a concave cutterhead, K, which rounds oi the top or outside of the stave. The stave then passes between the second pair of feed-rolls, L L', the top one of which is concave,to t the stave which has been rounded oft by the cutter K, and then passes under the second concave roll, M, and over the convex cutter M', which concaves the under or inside of the stave. The stave is then moved forward to the withdrawing rolls N N', Figs. 3 and 8, the upper one of which is concave and the under convex. These rolls carry the finished stave from the machine.

The chain is arranged with hooks b b' at certain distances apart, to take one stave after another.

On both sides of the frame, and between the rolls, are two rods, T T', Figs. 2, 5, and 6, held and adjusted by screws in such a manner as to keep the stave between the centers of the rolls.

are to adjust the chain-wheels to take up the slack of the chain as required. Theupper feedwheels are held down by springs acting on sliding boxes. v

The machine can be used in dressing staves that have been sawed. The power is communicated to the cutter-heads K and M', Figs. 1 and 3, lby means of the belt-pulleys K4 M3. Power is communicated from the gear wheel F', Figs. 1 and 2, (which, as already stated, is driven by the shaft Dfi) by means of the gears F2, F3, and F4, to the cam F5 F6. Power is communicated from the gear F', through the intermediate gear, W, and the gear K3, Fig. 1, to the roller K', Fig. 3. Then the power is communicated from the gear K3, through the intermediate gear, L4, to the gear L3 L2, Figs. 1 and 2, to the feed rollers L L', Fig. 3. Then the power is communicated from the gear L3, through the gears W' VV2 W3, to the gears N3 N2, Fig. 1, thence tothe withdrawing rollsN' N. Then power is communicated from the gear N2 to the gears N4 M3, Fig.1, thence to the roller M, Fig. 3.

I claim- 1. In a barrelstave machine, the combination of the swinging housings 1t R' and the adjustable pivot R with the pivot adjusting hell-crank lever R5, the operating-links R6 and F8, swinging lever S,opening and closing links a' a2, and cam F5, whereby the cutter-heads H and H' are automatically swung about their common pivot R2, and the said pivot adjusted vertically, all operating together substantially as described, aud for the purpose set forth.

2. In a barrel-stave machine, the combination of the chain B, the grooved rollers D2 D3. and the sprocketed roller D with the sprocketed feed-rollerD', said roller D' serving as bearer for the chain, and also as a bed-roll for the stave to rest upon, all operating together substantially as described, and for the purpose set forth.

3. In a barrelstave machine, the guides T T', provided with adjusting screw-rods, as shown, whereby they may be adjusted to or from each other, in combination with the feedrolls D' D5 L L' N N' and the cutter-heads K M', all shaped and adapted to opera te together substantially as described, and t'or the purpose set forth.

WILLIAM HALL GRIFFITH S.

W'itnesses HELEN M. FEEGAN WILLIAM EDsoN.

IOO 

